No new lessons here: Retired consultant killed by son who suffered with schizophrenia.

by TheEditor

Categories: Investigative, Mental Health

The case of Daniel Harrison, who was convicted of manslaughter by diminished responsibility after killing his father, Dr Nicholas Kim Harrison, highlights significant failings in mental health care management.  The Coroner gave a narrative verdict on 16/04/2024. The homicide had happened in March 2022. [References and sources at the end]

Daniel Harrison, diagnosed with paranoid schizophrenia, experienced a deterioration in his condition. He was lost follow-up care from Swansea Bay University Health Board in 2018 after he was removed from a CMHT list. Daniel’s condition worsened to the point where he was detained under the Mental Health Act at Neath Port Talbot Hospital for aggressive behaviour towards his parents.

On the day of the incident, Daniel escaped from the hospital by pushing past a nurse at a secure door, took a taxi to his family home, and attacked his father, leading to fatal injuries.

The coroner criticised the health board for ignoring family warnings and failing to engage adequately with Daniel, contributing to the tragic outcome. The inquest also highlighted a defensive attitude among staff and a lack of accountability within the healthcare system, which were seen as factors in the systemic failures.

In response to the incident, the Swansea Bay University Health Board acknowledged their failings and apologised to the Harrison family, stating their commitment to preventing such events in the future by improving security measures and ensuring better integration of family insights into patient care.

Coroners findings summarised

1. Inadequate Assessment and Diagnosis: The coroner found that Daniel Harrison’s mental health assessment and diagnosis were not conducted adequately. This lack of proper assessment contributed to a failure in recognising the severity of his condition.

2. Failure to Act on Family Concerns: Despite repeated concerns raised by Daniel Harrison’s family about his deteriorating mental health, these warnings were largely ignored. The family’s input, which could have provided valuable insights into Daniel’s condition, was not given the necessary attention.

3. Lapse in Follow-up Care: Daniel Harrison was lost to follow-up by Swansea Bay University Health Board in 2018. This lapse in continuous care allowed his condition to deteriorate unchecked over several years.

4. Security Failures at the Hospital: The security measures at Neath Port Talbot Hospital were inadequate. Daniel was able to escape by pushing past a nurse at a security door, indicating a failure in maintaining secure conditions for patients detained under the Mental Health Act.

5. Defensive Attitude and Lack of Accountability: The coroner noted a defensive attitude among the healthcare staff and a lack of accountability. This culture of defensiveness persisted even during the inquest, suggesting systemic issues within the health board.

6. Inadequate Response Post-Escape: After Daniel escaped from the hospital, the response was not timely or adequate. Although the hospital staff phoned his family, the measures taken were insufficient to prevent the subsequent tragic events.

7. Systemic Failures in Mental Health Care Provision: The coroner highlighted systemic failures in how mental health care was provided. This included the need for better integration of family insights into patient care plans and more robust follow-up procedures to prevent patients from being lost in the system.

Timeline of Key Events in Daniel Harrison’s Case

Late 2017: Daniel Harrison (DH) stops taking his medication for paranoid schizophrenia, which he was diagnosed with at age 22.

2018: DH loses follow-up care from Swansea Bay University Health Board, marking the beginning of a period of deteriorating mental health【6†source】.

Early March 2022: DH’s mental health condition worsens significantly, showing severe aggression towards his parents. He is detained under the Mental Health Act and admitted to Neath Port Talbot Hospital

12 March 2022: DH escapes from Neath Port Talbot Hospital by pushing past a nurse at a secure door. He takes a taxi to his family home in Clydach, Swansea

12 March 2022 (Later that day): DH attacks and kills his father, Dr. Kim Harrison, at their home. He believes his mother is in danger from his father due to his delusional beliefs.

14 March 2022: DH is arrested at Swansea railway station after fleeing the scene and taking a train to London.

August 2022: DH pleads guilty to manslaughter by diminished responsibility and is detained indefinitely in a secure unit under a hospital order.

16 April 2024: The coroner’s inquest concludes. The coroner criticises Swansea Bay University Health Board for multiple failings in DH’s care, including inadequate assessment, failure to act on family concerns, and security lapses at the hospital.

Lessons learned or not learned.

The systemic failures highlighted in the Daniel Harrison case are not unique and have been identified in numerous homicide inquiries involving individuals with severe mental health issues. Here are some critical points of consideration:

Recurring Issues:

  1. Inadequate Risk Assessments:
    • Consistently, failures in conducting thorough risk assessments have been identified as a critical lapse in mental health care. Proper risk assessment protocols and timely interventions are crucial to prevent violent incidents.
    • Similar cases have highlighted the need for improved training and protocols to assess and manage high-risk patients effectively.
  2. Failure to Act on Family Concerns:
    • Families often provide crucial insights into the mental state and risks associated with their loved ones. Ignoring these inputs has repeatedly been a significant factor in preventable tragedies.
    • Engaging with and acting upon family concerns is an area requiring persistent attention and improvement.
  3. Lapses in Continuity of Care:
    • The loss of follow-up care for chronic mental health patients, as seen in Daniel Harrison’s case, is a recurring theme. Continuous, integrated care plans are essential for managing severe mental health conditions.
    • Ensuring that patients do not fall through the cracks of the healthcare system remains a challenge that needs robust addressing.
  4. Security Failures in Mental Health Facilities:
    • Inadequate security measures that allow high-risk patients to abscond have been identified in several inquiries. Strengthening these protocols is a well-known need.
    • Effective security systems and protocols must be rigorously implemented and monitored.

Was this homicide preventable? 

Understanding Preventability

Definition and Context: Preventability, in the context of medical and mental health incidents, refers to the likelihood that an adverse event, such as a homicide, could have been avoided through different actions or interventions. It involves assessing whether appropriate measures, if implemented correctly and timely, could have altered the outcome. This assessment considers both systemic factors, such as healthcare policies and institutional protocols, and individual factors, including the actions of healthcare providers and the compliance of patients with treatment plans.

Application to Mental Health and Homicide: In cases involving mental health-related homicides, preventability examines whether failures in the mental health care system contributed to the incident. This involves reviewing the adequacy of risk assessments, the responsiveness to warning signs, the effectiveness of communication among healthcare professionals and family members, and the implementation of security measures. For a homicide to be considered preventable, there must be clear evidence that foreseeable risks were not adequately managed, and that reasonable actions could have been taken to prevent the tragic outcome.

The conclusion is that given the multiple missed opportunities to intervene in Daniel Harrison’s care and the foreseeability of harm, it is reasonable to conclude that the homicide of Dr Kim Harrison was preventable.

Conclusion and takeaway points

The tragic case of Daniel Harrison underscores the concept of preventability in mental health care, where systemic failures contributed to a fatal outcome that could have been avoided. Daniel’s deteriorating mental health, exacerbated by the loss of follow-up care and ignored warnings from his family, highlighted significant gaps in the healthcare system. Despite his severe condition and history of aggression, critical opportunities for intervention were missed, leading to his father’s death. This preventability aspect emphasises the need for thorough risk assessments, continuous patient monitoring, and responsive actions to family concerns, all of which were lacking in this case

The response from Swansea Bay University Health Board, which included an apology and a commitment to apply “lessons learned,” rings hollow against the backdrop of repeated failures that have been seen in many previous homicide inquiries. The issues identified—such as inadequate risk assessments, failure to act on family warnings, and lapses in patient care continuity—are not new lessons but well-known deficiencies that continue to plague the mental health care system. The repeated nature of these failures suggests a lack of meaningful progress and implementation of effective solutions, rather than a need for further identification of issues.

This case reveals deep-seated systemic failures within the mental health care framework, where known risks are insufficiently managed, and critical safety protocols are inadequately enforced. The tragedy of Dr Kim Harrison’s death could have been prevented with robust and proactive healthcare measures. Moving forward, the emphasis must be on rigorously applying and monitoring effective interventions rather than merely acknowledging existing gaps. Without this shift from identification to implementation and accountability, similar preventable tragedies are likely to continue, reflecting a failure to protect the most vulnerable patients adequately.


  1. Coroners PFD:
  5. Prevalence, severity, and nature of preventable patient harm across medical care settings: systematic review and meta-analysis – BMJ 2019 Jul 17:366:l4185. doi: 10.1136/bmj.l4185.

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